AMC1302-Q1: Is it possible to connect GND1 to GND2 and also short VDD1 and VDD2 to use it as "low side bidirectional current sense fully differential amplifier with single supple voltage"?

Yoshiki Ochi

Part Number: AMC1302-Q1

Hi team,

Is it possible to connect GND1 to GND2 and also short VDD1 and VDD2 to use it as "low side bidirectional current sense fully differential amplifier with single supple voltage"?

I would like to use fixed gain 41 instead of 8.2. Also I need bidirectional current sense with low shunt voltage for low power dissipation on shunt resistor.

Lower figure shows the schematic I am considering, could you give your comment for whether it works or not?

Regards,
Ochi

over 2 years ago

0 kai klaas69 over 2 years ago

Guru 140200 points

Hi Otchi,

yes you can do this, provided the input voltage runs from -50mV to 50mV. And the gain will be 41.

Kai

0 Alexander Smith over 2 years ago in reply to kai klaas69

TI__Mastermind 47595 points

Hi Ochi-san,

Yes, this is ok. As Kai said the input voltage range is +/-50mV with an internal gain of 41. Please note that when configured in this manor the device will not provide any isolation.

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AMC1302-Q1: Is it possible to connect GND1 to GND2 and also short VDD1 and VDD2 to use it as "low side bidirectional current sense fully differential amplifier with single supple voltage"?